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Diffstat (limited to 'drivers/net/wireless/iwlegacy/iwl-core.c')
-rw-r--r--drivers/net/wireless/iwlegacy/iwl-core.c2674
1 files changed, 2674 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlegacy/iwl-core.c b/drivers/net/wireless/iwlegacy/iwl-core.c
new file mode 100644
index 000000000000..d418b647be80
--- /dev/null
+++ b/drivers/net/wireless/iwlegacy/iwl-core.c
@@ -0,0 +1,2674 @@
+/******************************************************************************
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ * Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *****************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/etherdevice.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <net/mac80211.h>
+
+#include "iwl-eeprom.h"
+#include "iwl-dev.h"
+#include "iwl-debug.h"
+#include "iwl-core.h"
+#include "iwl-io.h"
+#include "iwl-power.h"
+#include "iwl-sta.h"
+#include "iwl-helpers.h"
+
+
+MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
+MODULE_VERSION(IWLWIFI_VERSION);
+MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
+MODULE_LICENSE("GPL");
+
+/*
+ * set bt_coex_active to true, uCode will do kill/defer
+ * every time the priority line is asserted (BT is sending signals on the
+ * priority line in the PCIx).
+ * set bt_coex_active to false, uCode will ignore the BT activity and
+ * perform the normal operation
+ *
+ * User might experience transmit issue on some platform due to WiFi/BT
+ * co-exist problem. The possible behaviors are:
+ * Able to scan and finding all the available AP
+ * Not able to associate with any AP
+ * On those platforms, WiFi communication can be restored by set
+ * "bt_coex_active" module parameter to "false"
+ *
+ * default: bt_coex_active = true (BT_COEX_ENABLE)
+ */
+static bool bt_coex_active = true;
+module_param(bt_coex_active, bool, S_IRUGO);
+MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
+
+u32 iwlegacy_debug_level;
+EXPORT_SYMBOL(iwlegacy_debug_level);
+
+const u8 iwlegacy_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
+EXPORT_SYMBOL(iwlegacy_bcast_addr);
+
+
+/* This function both allocates and initializes hw and priv. */
+struct ieee80211_hw *iwl_legacy_alloc_all(struct iwl_cfg *cfg)
+{
+ struct iwl_priv *priv;
+ /* mac80211 allocates memory for this device instance, including
+ * space for this driver's private structure */
+ struct ieee80211_hw *hw;
+
+ hw = ieee80211_alloc_hw(sizeof(struct iwl_priv),
+ cfg->ops->ieee80211_ops);
+ if (hw == NULL) {
+ pr_err("%s: Can not allocate network device\n",
+ cfg->name);
+ goto out;
+ }
+
+ priv = hw->priv;
+ priv->hw = hw;
+
+out:
+ return hw;
+}
+EXPORT_SYMBOL(iwl_legacy_alloc_all);
+
+#define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
+#define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
+static void iwl_legacy_init_ht_hw_capab(const struct iwl_priv *priv,
+ struct ieee80211_sta_ht_cap *ht_info,
+ enum ieee80211_band band)
+{
+ u16 max_bit_rate = 0;
+ u8 rx_chains_num = priv->hw_params.rx_chains_num;
+ u8 tx_chains_num = priv->hw_params.tx_chains_num;
+
+ ht_info->cap = 0;
+ memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
+
+ ht_info->ht_supported = true;
+
+ ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
+ max_bit_rate = MAX_BIT_RATE_20_MHZ;
+ if (priv->hw_params.ht40_channel & BIT(band)) {
+ ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+ ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
+ ht_info->mcs.rx_mask[4] = 0x01;
+ max_bit_rate = MAX_BIT_RATE_40_MHZ;
+ }
+
+ if (priv->cfg->mod_params->amsdu_size_8K)
+ ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
+
+ ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
+ ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
+
+ ht_info->mcs.rx_mask[0] = 0xFF;
+ if (rx_chains_num >= 2)
+ ht_info->mcs.rx_mask[1] = 0xFF;
+ if (rx_chains_num >= 3)
+ ht_info->mcs.rx_mask[2] = 0xFF;
+
+ /* Highest supported Rx data rate */
+ max_bit_rate *= rx_chains_num;
+ WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
+ ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
+
+ /* Tx MCS capabilities */
+ ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
+ if (tx_chains_num != rx_chains_num) {
+ ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
+ ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
+ IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
+ }
+}
+
+/**
+ * iwl_legacy_init_geos - Initialize mac80211's geo/channel info based from eeprom
+ */
+int iwl_legacy_init_geos(struct iwl_priv *priv)
+{
+ struct iwl_channel_info *ch;
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_channel *channels;
+ struct ieee80211_channel *geo_ch;
+ struct ieee80211_rate *rates;
+ int i = 0;
+
+ if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
+ priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
+ IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
+ set_bit(STATUS_GEO_CONFIGURED, &priv->status);
+ return 0;
+ }
+
+ channels = kzalloc(sizeof(struct ieee80211_channel) *
+ priv->channel_count, GFP_KERNEL);
+ if (!channels)
+ return -ENOMEM;
+
+ rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
+ GFP_KERNEL);
+ if (!rates) {
+ kfree(channels);
+ return -ENOMEM;
+ }
+
+ /* 5.2GHz channels start after the 2.4GHz channels */
+ sband = &priv->bands[IEEE80211_BAND_5GHZ];
+ sband->channels = &channels[ARRAY_SIZE(iwlegacy_eeprom_band_1)];
+ /* just OFDM */
+ sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
+ sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
+
+ if (priv->cfg->sku & IWL_SKU_N)
+ iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
+ IEEE80211_BAND_5GHZ);
+
+ sband = &priv->bands[IEEE80211_BAND_2GHZ];
+ sband->channels = channels;
+ /* OFDM & CCK */
+ sband->bitrates = rates;
+ sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
+
+ if (priv->cfg->sku & IWL_SKU_N)
+ iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
+ IEEE80211_BAND_2GHZ);
+
+ priv->ieee_channels = channels;
+ priv->ieee_rates = rates;
+
+ for (i = 0; i < priv->channel_count; i++) {
+ ch = &priv->channel_info[i];
+
+ if (!iwl_legacy_is_channel_valid(ch))
+ continue;
+
+ if (iwl_legacy_is_channel_a_band(ch))
+ sband = &priv->bands[IEEE80211_BAND_5GHZ];
+ else
+ sband = &priv->bands[IEEE80211_BAND_2GHZ];
+
+ geo_ch = &sband->channels[sband->n_channels++];
+
+ geo_ch->center_freq =
+ ieee80211_channel_to_frequency(ch->channel, ch->band);
+ geo_ch->max_power = ch->max_power_avg;
+ geo_ch->max_antenna_gain = 0xff;
+ geo_ch->hw_value = ch->channel;
+
+ if (iwl_legacy_is_channel_valid(ch)) {
+ if (!(ch->flags & EEPROM_CHANNEL_IBSS))
+ geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
+
+ if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
+ geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
+
+ if (ch->flags & EEPROM_CHANNEL_RADAR)
+ geo_ch->flags |= IEEE80211_CHAN_RADAR;
+
+ geo_ch->flags |= ch->ht40_extension_channel;
+
+ if (ch->max_power_avg > priv->tx_power_device_lmt)
+ priv->tx_power_device_lmt = ch->max_power_avg;
+ } else {
+ geo_ch->flags |= IEEE80211_CHAN_DISABLED;
+ }
+
+ IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
+ ch->channel, geo_ch->center_freq,
+ iwl_legacy_is_channel_a_band(ch) ? "5.2" : "2.4",
+ geo_ch->flags & IEEE80211_CHAN_DISABLED ?
+ "restricted" : "valid",
+ geo_ch->flags);
+ }
+
+ if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
+ priv->cfg->sku & IWL_SKU_A) {
+ IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
+ "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
+ priv->pci_dev->device,
+ priv->pci_dev->subsystem_device);
+ priv->cfg->sku &= ~IWL_SKU_A;
+ }
+
+ IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
+ priv->bands[IEEE80211_BAND_2GHZ].n_channels,
+ priv->bands[IEEE80211_BAND_5GHZ].n_channels);
+
+ set_bit(STATUS_GEO_CONFIGURED, &priv->status);
+
+ return 0;
+}
+EXPORT_SYMBOL(iwl_legacy_init_geos);
+
+/*
+ * iwl_legacy_free_geos - undo allocations in iwl_legacy_init_geos
+ */
+void iwl_legacy_free_geos(struct iwl_priv *priv)
+{
+ kfree(priv->ieee_channels);
+ kfree(priv->ieee_rates);
+ clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
+}
+EXPORT_SYMBOL(iwl_legacy_free_geos);
+
+static bool iwl_legacy_is_channel_extension(struct iwl_priv *priv,
+ enum ieee80211_band band,
+ u16 channel, u8 extension_chan_offset)
+{
+ const struct iwl_channel_info *ch_info;
+
+ ch_info = iwl_legacy_get_channel_info(priv, band, channel);
+ if (!iwl_legacy_is_channel_valid(ch_info))
+ return false;
+
+ if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
+ return !(ch_info->ht40_extension_channel &
+ IEEE80211_CHAN_NO_HT40PLUS);
+ else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
+ return !(ch_info->ht40_extension_channel &
+ IEEE80211_CHAN_NO_HT40MINUS);
+
+ return false;
+}
+
+bool iwl_legacy_is_ht40_tx_allowed(struct iwl_priv *priv,
+ struct iwl_rxon_context *ctx,
+ struct ieee80211_sta_ht_cap *ht_cap)
+{
+ if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
+ return false;
+
+ /*
+ * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
+ * the bit will not set if it is pure 40MHz case
+ */
+ if (ht_cap && !ht_cap->ht_supported)
+ return false;
+
+#ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
+ if (priv->disable_ht40)
+ return false;
+#endif
+
+ return iwl_legacy_is_channel_extension(priv, priv->band,
+ le16_to_cpu(ctx->staging.channel),
+ ctx->ht.extension_chan_offset);
+}
+EXPORT_SYMBOL(iwl_legacy_is_ht40_tx_allowed);
+
+static u16 iwl_legacy_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
+{
+ u16 new_val;
+ u16 beacon_factor;
+
+ /*
+ * If mac80211 hasn't given us a beacon interval, program
+ * the default into the device.
+ */
+ if (!beacon_val)
+ return DEFAULT_BEACON_INTERVAL;
+
+ /*
+ * If the beacon interval we obtained from the peer
+ * is too large, we'll have to wake up more often
+ * (and in IBSS case, we'll beacon too much)
+ *
+ * For example, if max_beacon_val is 4096, and the
+ * requested beacon interval is 7000, we'll have to
+ * use 3500 to be able to wake up on the beacons.
+ *
+ * This could badly influence beacon detection stats.
+ */
+
+ beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
+ new_val = beacon_val / beacon_factor;
+
+ if (!new_val)
+ new_val = max_beacon_val;
+
+ return new_val;
+}
+
+int
+iwl_legacy_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
+{
+ u64 tsf;
+ s32 interval_tm, rem;
+ struct ieee80211_conf *conf = NULL;
+ u16 beacon_int;
+ struct ieee80211_vif *vif = ctx->vif;
+
+ conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
+
+ lockdep_assert_held(&priv->mutex);
+
+ memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
+
+ ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
+ ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
+
+ beacon_int = vif ? vif->bss_conf.beacon_int : 0;
+
+ /*
+ * TODO: For IBSS we need to get atim_window from mac80211,
+ * for now just always use 0
+ */
+ ctx->timing.atim_window = 0;
+
+ beacon_int = iwl_legacy_adjust_beacon_interval(beacon_int,
+ priv->hw_params.max_beacon_itrvl * TIME_UNIT);
+ ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
+
+ tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
+ interval_tm = beacon_int * TIME_UNIT;
+ rem = do_div(tsf, interval_tm);
+ ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
+
+ ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
+
+ IWL_DEBUG_ASSOC(priv,
+ "beacon interval %d beacon timer %d beacon tim %d\n",
+ le16_to_cpu(ctx->timing.beacon_interval),
+ le32_to_cpu(ctx->timing.beacon_init_val),
+ le16_to_cpu(ctx->timing.atim_window));
+
+ return iwl_legacy_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
+ sizeof(ctx->timing), &ctx->timing);
+}
+EXPORT_SYMBOL(iwl_legacy_send_rxon_timing);
+
+void
+iwl_legacy_set_rxon_hwcrypto(struct iwl_priv *priv,
+ struct iwl_rxon_context *ctx,
+ int hw_decrypt)
+{
+ struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
+
+ if (hw_decrypt)
+ rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
+ else
+ rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
+
+}
+EXPORT_SYMBOL(iwl_legacy_set_rxon_hwcrypto);
+
+/* validate RXON structure is valid */
+int
+iwl_legacy_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
+{
+ struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
+ bool error = false;
+
+ if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
+ if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
+ IWL_WARN(priv, "check 2.4G: wrong narrow\n");
+ error = true;
+ }
+ if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
+ IWL_WARN(priv, "check 2.4G: wrong radar\n");
+ error = true;
+ }
+ } else {
+ if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
+ IWL_WARN(priv, "check 5.2G: not short slot!\n");
+ error = true;
+ }
+ if (rxon->flags & RXON_FLG_CCK_MSK) {
+ IWL_WARN(priv, "check 5.2G: CCK!\n");
+ error = true;
+ }
+ }
+ if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
+ IWL_WARN(priv, "mac/bssid mcast!\n");
+ error = true;
+ }
+
+ /* make sure basic rates 6Mbps and 1Mbps are supported */
+ if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
+ (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
+ IWL_WARN(priv, "neither 1 nor 6 are basic\n");
+ error = true;
+ }
+
+ if (le16_to_cpu(rxon->assoc_id) > 2007) {
+ IWL_WARN(priv, "aid > 2007\n");
+ error = true;
+ }
+
+ if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
+ == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
+ IWL_WARN(priv, "CCK and short slot\n");
+ error = true;
+ }
+
+ if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
+ == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
+ IWL_WARN(priv, "CCK and auto detect");
+ error = true;
+ }
+
+ if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
+ RXON_FLG_TGG_PROTECT_MSK)) ==
+ RXON_FLG_TGG_PROTECT_MSK) {
+ IWL_WARN(priv, "TGg but no auto-detect\n");
+ error = true;
+ }
+
+ if (error)
+ IWL_WARN(priv, "Tuning to channel %d\n",
+ le16_to_cpu(rxon->channel));
+
+ if (error) {
+ IWL_ERR(priv, "Invalid RXON\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(iwl_legacy_check_rxon_cmd);
+
+/**
+ * iwl_legacy_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
+ * @priv: staging_rxon is compared to active_rxon
+ *
+ * If the RXON structure is changing enough to require a new tune,
+ * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
+ * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
+ */
+int iwl_legacy_full_rxon_required(struct iwl_priv *priv,
+ struct iwl_rxon_context *ctx)
+{
+ const struct iwl_legacy_rxon_cmd *staging = &ctx->staging;
+ const struct iwl_legacy_rxon_cmd *active = &ctx->active;
+
+#define CHK(cond) \
+ if ((cond)) { \
+ IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
+ return 1; \
+ }
+
+#define CHK_NEQ(c1, c2) \
+ if ((c1) != (c2)) { \
+ IWL_DEBUG_INFO(priv, "need full RXON - " \
+ #c1 " != " #c2 " - %d != %d\n", \
+ (c1), (c2)); \
+ return 1; \
+ }
+
+ /* These items are only settable from the full RXON command */
+ CHK(!iwl_legacy_is_associated_ctx(ctx));
+ CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
+ CHK(compare_ether_addr(staging->node_addr, active->node_addr));
+ CHK(compare_ether_addr(staging->wlap_bssid_addr,
+ active->wlap_bssid_addr));
+ CHK_NEQ(staging->dev_type, active->dev_type);
+ CHK_NEQ(staging->channel, active->channel);
+ CHK_NEQ(staging->air_propagation, active->air_propagation);
+ CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
+ active->ofdm_ht_single_stream_basic_rates);
+ CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
+ active->ofdm_ht_dual_stream_basic_rates);
+ CHK_NEQ(staging->assoc_id, active->assoc_id);
+
+ /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
+ * be updated with the RXON_ASSOC command -- however only some
+ * flag transitions are allowed using RXON_ASSOC */
+
+ /* Check if we are not switching bands */
+ CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
+ active->flags & RXON_FLG_BAND_24G_MSK);
+
+ /* Check if we are switching association toggle */
+ CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
+ active->filter_flags & RXON_FILTER_ASSOC_MSK);
+
+#undef CHK
+#undef CHK_NEQ
+
+ return 0;
+}
+EXPORT_SYMBOL(iwl_legacy_full_rxon_required);
+
+u8 iwl_legacy_get_lowest_plcp(struct iwl_priv *priv,
+ struct iwl_rxon_context *ctx)
+{
+ /*
+ * Assign the lowest rate -- should really get this from
+ * the beacon skb from mac80211.
+ */
+ if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
+ return IWL_RATE_1M_PLCP;
+ else
+ return IWL_RATE_6M_PLCP;
+}
+EXPORT_SYMBOL(iwl_legacy_get_lowest_plcp);
+
+static void _iwl_legacy_set_rxon_ht(struct iwl_priv *priv,
+ struct iwl_ht_config *ht_conf,
+ struct iwl_rxon_context *ctx)
+{
+ struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
+
+ if (!ctx->ht.enabled) {
+ rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
+ RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
+ RXON_FLG_HT40_PROT_MSK |
+ RXON_FLG_HT_PROT_MSK);
+ return;
+ }
+
+ rxon->flags |= cpu_to_le32(ctx->ht.protection <<
+ RXON_FLG_HT_OPERATING_MODE_POS);
+
+ /* Set up channel bandwidth:
+ * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
+ /* clear the HT channel mode before set the mode */
+ rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
+ RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
+ if (iwl_legacy_is_ht40_tx_allowed(priv, ctx, NULL)) {
+ /* pure ht40 */
+ if (ctx->ht.protection ==
+ IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
+ rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
+ /* Note: control channel is opposite of extension channel */
+ switch (ctx->ht.extension_chan_offset) {
+ case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
+ rxon->flags &=
+ ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
+ break;
+ case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
+ rxon->flags |=
+ RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
+ break;
+ }
+ } else {
+ /* Note: control channel is opposite of extension channel */
+ switch (ctx->ht.extension_chan_offset) {
+ case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
+ rxon->flags &=
+ ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
+ rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
+ break;
+ case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
+ rxon->flags |=
+ RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
+ rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
+ break;
+ case IEEE80211_HT_PARAM_CHA_SEC_NONE:
+ default:
+ /* channel location only valid if in Mixed mode */
+ IWL_ERR(priv,
+ "invalid extension channel offset\n");
+ break;
+ }
+ }
+ } else {
+ rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
+ }
+
+ if (priv->cfg->ops->hcmd->set_rxon_chain)
+ priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
+
+ IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
+ "extension channel offset 0x%x\n",
+ le32_to_cpu(rxon->flags), ctx->ht.protection,
+ ctx->ht.extension_chan_offset);
+}
+
+void iwl_legacy_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
+{
+ struct iwl_rxon_context *ctx;
+
+ for_each_context(priv, ctx)
+ _iwl_legacy_set_rxon_ht(priv, ht_conf, ctx);
+}
+EXPORT_SYMBOL(iwl_legacy_set_rxon_ht);
+
+/* Return valid, unused, channel for a passive scan to reset the RF */
+u8 iwl_legacy_get_single_channel_number(struct iwl_priv *priv,
+ enum ieee80211_band band)
+{
+ const struct iwl_channel_info *ch_info;
+ int i;
+ u8 channel = 0;
+ u8 min, max;
+ struct iwl_rxon_context *ctx;
+
+ if (band == IEEE80211_BAND_5GHZ) {
+ min = 14;
+ max = priv->channel_count;
+ } else {
+ min = 0;
+ max = 14;
+ }
+
+ for (i = min; i < max; i++) {
+ bool busy = false;
+
+ for_each_context(priv, ctx) {
+ busy = priv->channel_info[i].channel ==
+ le16_to_cpu(ctx->staging.channel);
+ if (busy)
+ break;
+ }
+
+ if (busy)
+ continue;
+
+ channel = priv->channel_info[i].channel;
+ ch_info = iwl_legacy_get_channel_info(priv, band, channel);
+ if (iwl_legacy_is_channel_valid(ch_info))
+ break;
+ }
+
+ return channel;
+}
+EXPORT_SYMBOL(iwl_legacy_get_single_channel_number);
+
+/**
+ * iwl_legacy_set_rxon_channel - Set the band and channel values in staging RXON
+ * @ch: requested channel as a pointer to struct ieee80211_channel
+
+ * NOTE: Does not commit to the hardware; it sets appropriate bit fields
+ * in the staging RXON flag structure based on the ch->band
+ */
+int
+iwl_legacy_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
+ struct iwl_rxon_context *ctx)
+{
+ enum ieee80211_band band = ch->band;
+ u16 channel = ch->hw_value;
+
+ if ((le16_to_cpu(ctx->staging.channel) == channel) &&
+ (priv->band == band))
+ return 0;
+
+ ctx->staging.channel = cpu_to_le16(channel);
+ if (band == IEEE80211_BAND_5GHZ)
+ ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
+ else
+ ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
+
+ priv->band = band;
+
+ IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
+
+ return 0;
+}
+EXPORT_SYMBOL(iwl_legacy_set_rxon_channel);
+
+void iwl_legacy_set_flags_for_band(struct iwl_priv *priv,
+ struct iwl_rxon_context *ctx,
+ enum ieee80211_band band,
+ struct ieee80211_vif *vif)
+{
+ if (band == IEEE80211_BAND_5GHZ) {
+ ctx->staging.flags &=
+ ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
+ | RXON_FLG_CCK_MSK);
+ ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
+ } else {
+ /* Copied from iwl_post_associate() */
+ if (vif && vif->bss_conf.use_short_slot)
+ ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
+ else
+ ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
+
+ ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
+ ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
+ ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
+ }
+}
+EXPORT_SYMBOL(iwl_legacy_set_flags_for_band);
+
+/*
+ * initialize rxon structure with default values from eeprom
+ */
+void iwl_legacy_connection_init_rx_config(struct iwl_priv *priv,
+ struct iwl_rxon_context *ctx)
+{
+ const struct iwl_channel_info *ch_info;
+
+ memset(&ctx->staging, 0, sizeof(ctx->staging));
+
+ if (!ctx->vif) {
+ ctx->staging.dev_type = ctx->unused_devtype;
+ } else
+ switch (ctx->vif->type) {
+
+ case NL80211_IFTYPE_STATION:
+ ctx->staging.dev_type = ctx->station_devtype;
+ ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
+ break;
+
+ case NL80211_IFTYPE_ADHOC:
+ ctx->staging.dev_type = ctx->ibss_devtype;
+ ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
+ ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
+ RXON_FILTER_ACCEPT_GRP_MSK;
+ break;
+
+ default:
+ IWL_ERR(priv, "Unsupported interface type %d\n",
+ ctx->vif->type);
+ break;
+ }
+
+#if 0
+ /* TODO: Figure out when short_preamble would be set and cache from
+ * that */
+ if (!hw_to_local(priv->hw)->short_preamble)
+ ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
+ else
+ ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
+#endif
+
+ ch_info = iwl_legacy_get_channel_info(priv, priv->band,
+ le16_to_cpu(ctx->active.channel));
+
+ if (!ch_info)
+ ch_info = &priv->channel_info[0];
+
+ ctx->staging.channel = cpu_to_le16(ch_info->channel);
+ priv->band = ch_info->band;
+
+ iwl_legacy_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
+
+ ctx->staging.ofdm_basic_rates =
+ (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
+ ctx->staging.cck_basic_rates =
+ (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
+
+ /* clear both MIX and PURE40 mode flag */
+ ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
+ RXON_FLG_CHANNEL_MODE_PURE_40);
+ if (ctx->vif)
+ memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
+
+ ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
+ ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
+}
+EXPORT_SYMBOL(iwl_legacy_connection_init_rx_config);
+
+void iwl_legacy_set_rate(struct iwl_priv *priv)
+{
+ const struct ieee80211_supported_band *hw = NULL;
+ struct ieee80211_rate *rate;
+ struct iwl_rxon_context *ctx;
+ int i;
+
+ hw = iwl_get_hw_mode(priv, priv->band);
+ if (!hw) {
+ IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
+ return;
+ }
+
+ priv->active_rate = 0;
+
+ for (i = 0; i < hw->n_bitrates; i++) {
+ rate = &(hw->bitrates[i]);
+ if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
+ priv->active_rate |= (1 << rate->hw_value);
+ }
+
+ IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
+
+ for_each_context(priv, ctx) {
+ ctx->staging.cck_basic_rates =
+ (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
+
+ ctx->staging.ofdm_basic_rates =
+ (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
+ }
+}
+EXPORT_SYMBOL(iwl_legacy_set_rate);
+
+void iwl_legacy_chswitch_done(struct iwl_priv *priv, bool is_success)
+{
+ struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+
+ if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+ return;
+
+ if (priv->switch_rxon.switch_in_progress) {
+ ieee80211_chswitch_done(ctx->vif, is_success);
+ mutex_lock(&priv->mutex);
+ priv->switch_rxon.switch_in_progress = false;
+ mutex_unlock(&priv->mutex);
+ }
+}
+EXPORT_SYMBOL(iwl_legacy_chswitch_done);
+
+void iwl_legacy_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
+{
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
+ struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
+
+ struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+ struct iwl_legacy_rxon_cmd *rxon = (void *)&ctx->active;
+
+ if (priv->switch_rxon.switch_in_progress) {
+ if (!le32_to_cpu(csa->status) &&
+ (csa->channel == priv->switch_rxon.channel)) {
+ rxon->channel = csa->channel;
+ ctx->staging.channel = csa->channel;
+ IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
+ le16_to_cpu(csa->channel));
+ iwl_legacy_chswitch_done(priv, true);
+ } else {
+ IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
+ le16_to_cpu(csa->channel));
+ iwl_legacy_chswitch_done(priv, false);
+ }
+ }
+}
+EXPORT_SYMBOL(iwl_legacy_rx_csa);
+
+#ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
+void iwl_legacy_print_rx_config_cmd(struct iwl_priv *priv,
+ struct iwl_rxon_context *ctx)
+{
+ struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
+
+ IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
+ iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
+ IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
+ le16_to_cpu(rxon->channel));
+ IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
+ IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
+ le32_to_cpu(rxon->filter_flags));
+ IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
+ IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
+ rxon->ofdm_basic_rates);
+ IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
+ rxon->cck_basic_rates);
+ IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
+ IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
+ IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
+ le16_to_cpu(rxon->assoc_id));
+}
+EXPORT_SYMBOL(iwl_legacy_print_rx_config_cmd);
+#endif
+/**
+ * iwl_legacy_irq_handle_error - called for HW or SW error interrupt from card
+ */
+void iwl_legacy_irq_handle_error(struct iwl_priv *priv)
+{
+ /* Set the FW error flag -- cleared on iwl_down */
+ set_bit(STATUS_FW_ERROR, &priv->status);
+
+ /* Cancel currently queued command. */
+ clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
+
+ IWL_ERR(priv, "Loaded firmware version: %s\n",
+ priv->hw->wiphy->fw_version);
+
+ priv->cfg->ops->lib->dump_nic_error_log(priv);
+ if (priv->cfg->ops->lib->dump_fh)
+ priv->cfg->ops->lib->dump_fh(priv, NULL, false);
+ priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
+#ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
+ if (iwl_legacy_get_debug_level(priv) & IWL_DL_FW_ERRORS)
+ iwl_legacy_print_rx_config_cmd(priv,
+ &priv->contexts[IWL_RXON_CTX_BSS]);
+#endif
+
+ wake_up_interruptible(&priv->wait_command_queue);
+
+ /* Keep the restart process from trying to send host
+ * commands by clearing the INIT status bit */
+ clear_bit(STATUS_READY, &priv->status);
+
+ if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
+ IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
+ "Restarting adapter due to uCode error.\n");
+
+ if (priv->cfg->mod_params->restart_fw)
+ queue_work(priv->workqueue, &priv->restart);
+ }
+}
+EXPORT_SYMBOL(iwl_legacy_irq_handle_error);
+
+static int iwl_legacy_apm_stop_master(struct iwl_priv *priv)
+{
+ int ret = 0;
+
+ /* stop device's busmaster DMA activity */
+ iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
+
+ ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
+ CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
+ if (ret)
+ IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
+
+ IWL_DEBUG_INFO(priv, "stop master\n");
+
+ return ret;
+}
+
+void iwl_legacy_apm_stop(struct iwl_priv *priv)
+{
+ IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
+
+ /* Stop device's DMA activity */
+ iwl_legacy_apm_stop_master(priv);
+
+ /* Reset the entire device */
+ iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
+
+ udelay(10);
+
+ /*
+ * Clear "initialization complete" bit to move adapter from
+ * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
+ */
+ iwl_legacy_clear_bit(priv, CSR_GP_CNTRL,
+ CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
+}
+EXPORT_SYMBOL(iwl_legacy_apm_stop);
+
+
+/*
+ * Start up NIC's basic functionality after it has been reset
+ * (e.g. after platform boot, or shutdown via iwl_legacy_apm_stop())
+ * NOTE: This does not load uCode nor start the embedded processor
+ */
+int iwl_legacy_apm_init(struct iwl_priv *priv)
+{
+ int ret = 0;
+ u16 lctl;
+
+ IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
+
+ /*
+ * Use "set_bit" below rather than "write", to preserve any hardware
+ * bits already set by default after reset.
+ */
+
+ /* Disable L0S exit timer (platform NMI Work/Around) */
+ iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
+ CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
+
+ /*
+ * Disable L0s without affecting L1;
+ * don't wait for ICH L0s (ICH bug W/A)
+ */
+ iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
+ CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
+
+ /* Set FH wait threshold to maximum (HW error during stress W/A) */
+ iwl_legacy_set_bit(priv, CSR_DBG_HPET_MEM_REG,
+ CSR_DBG_HPET_MEM_REG_VAL);
+
+ /*
+ * Enable HAP INTA (interrupt from management bus) to
+ * wake device's PCI Express link L1a -> L0s
+ * NOTE: This is no-op for 3945 (non-existant bit)
+ */
+ iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
+ CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
+
+ /*
+ * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
+ * Check if BIOS (or OS) enabled L1-ASPM on this device.
+ * If so (likely), disable L0S, so device moves directly L0->L1;
+ * costs negligible amount of power savings.
+ * If not (unlikely), enable L0S, so there is at least some
+ * power savings, even without L1.
+ */
+ if (priv->cfg->base_params->set_l0s) {
+ lctl = iwl_legacy_pcie_link_ctl(priv);
+ if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
+ PCI_CFG_LINK_CTRL_VAL_L1_EN) {
+ /* L1-ASPM enabled; disable(!) L0S */
+ iwl_legacy_set_bit(priv, CSR_GIO_REG,
+ CSR_GIO_REG_VAL_L0S_ENABLED);
+ IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
+ } else {
+ /* L1-ASPM disabled; enable(!) L0S */
+ iwl_legacy_clear_bit(priv, CSR_GIO_REG,
+ CSR_GIO_REG_VAL_L0S_ENABLED);
+ IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
+ }
+ }
+
+ /* Configure analog phase-lock-loop before activating to D0A */
+ if (priv->cfg->base_params->pll_cfg_val)
+ iwl_legacy_set_bit(priv, CSR_ANA_PLL_CFG,
+ priv->cfg->base_params->pll_cfg_val);
+
+ /*
+ * Set "initialization complete" bit to move adapter from
+ * D0U* --> D0A* (powered-up active) state.
+ */
+ iwl_legacy_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
+
+ /*
+ * Wait for clock stabilization; once stabilized, access to
+ * device-internal resources is supported, e.g. iwl_legacy_write_prph()
+ * and accesses to uCode SRAM.
+ */
+ ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
+ CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
+ CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
+ if (ret < 0) {
+ IWL_DEBUG_INFO(priv, "Failed to init the card\n");
+ goto out;
+ }
+
+ /*
+ * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
+ * BSM (Boostrap State Machine) is only in 3945 and 4965.
+ *
+ * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
+ * do not disable clocks. This preserves any hardware bits already
+ * set by default in "CLK_CTRL_REG" after reset.
+ */
+ if (priv->cfg->base_params->use_bsm)
+ iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
+ APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
+ else
+ iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
+ APMG_CLK_VAL_DMA_CLK_RQT);
+ udelay(20);
+
+ /* Disable L1-Active */
+ iwl_legacy_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
+ APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL(iwl_legacy_apm_init);
+
+
+int iwl_legacy_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
+{
+ int ret;
+ s8 prev_tx_power;
+ bool defer;
+ struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+
+ lockdep_assert_held(&priv->mutex);
+
+ if (priv->tx_power_user_lmt == tx_power && !force)
+ return 0;
+
+ if (!priv->cfg->ops->lib->send_tx_power)
+ return -EOPNOTSUPP;
+
+ if (tx_power < IWL4965_TX_POWER_TARGET_POWER_MIN) {
+ IWL_WARN(priv,
+ "Requested user TXPOWER %d below lower limit %d.\n",
+ tx_power,
+ IWL4965_TX_POWER_TARGET_POWER_MIN);
+ return -EINVAL;
+ }
+
+ if (tx_power > priv->tx_power_device_lmt) {
+ IWL_WARN(priv,
+ "Requested user TXPOWER %d above upper limit %d.\n",
+ tx_power, priv->tx_power_device_lmt);
+ return -EINVAL;
+ }
+
+ if (!iwl_legacy_is_ready_rf(priv))
+ return -EIO;
+
+ /* scan complete and commit_rxon use tx_power_next value,
+ * it always need to be updated for newest request */
+ priv->tx_power_next = tx_power;
+
+ /* do not set tx power when scanning or channel changing */
+ defer = test_bit(STATUS_SCANNING, &priv->status) ||
+ memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
+ if (defer && !force) {
+ IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
+ return 0;
+ }
+
+ prev_tx_power = priv->tx_power_user_lmt;
+ priv->tx_power_user_lmt = tx_power;
+
+ ret = priv->cfg->ops->lib->send_tx_power(priv);
+
+ /* if fail to set tx_power, restore the orig. tx power */
+ if (ret) {
+ priv->tx_power_user_lmt = prev_tx_power;
+ priv->tx_power_next = prev_tx_power;
+ }
+ return ret;
+}
+EXPORT_SYMBOL(iwl_legacy_set_tx_power);
+
+void iwl_legacy_send_bt_config(struct iwl_priv *priv)
+{
+ struct iwl_bt_cmd bt_cmd = {
+ .lead_time = BT_LEAD_TIME_DEF,
+ .max_kill = BT_MAX_KILL_DEF,
+ .kill_ack_mask = 0,
+ .kill_cts_mask = 0,
+ };
+
+ if (!bt_coex_active)
+ bt_cmd.flags = BT_COEX_DISABLE;
+ else
+ bt_cmd.flags = BT_COEX_ENABLE;
+
+ IWL_DEBUG_INFO(priv, "BT coex %s\n",
+ (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
+
+ if (iwl_legacy_send_cmd_pdu(priv, REPLY_BT_CONFIG,
+ sizeof(struct iwl_bt_cmd), &bt_cmd))
+ IWL_ERR(priv, "failed to send BT Coex Config\n");
+}
+EXPORT_SYMBOL(iwl_legacy_send_bt_config);
+
+int iwl_legacy_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
+{
+ struct iwl_statistics_cmd statistics_cmd = {
+ .configuration_flags =
+ clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
+ };
+
+ if (flags & CMD_ASYNC)
+ return iwl_legacy_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
+ sizeof(struct iwl_statistics_cmd),
+ &statistics_cmd, NULL);
+ else
+ return iwl_legacy_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
+ sizeof(struct iwl_statistics_cmd),
+ &statistics_cmd);
+}
+EXPORT_SYMBOL(iwl_legacy_send_statistics_request);
+
+void iwl_legacy_rx_pm_sleep_notif(struct iwl_priv *priv,
+ struct iwl_rx_mem_buffer *rxb)
+{
+#ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
+ struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
+ IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
+ sleep->pm_sleep_mode, sleep->pm_wakeup_src);
+#endif
+}
+EXPORT_SYMBOL(iwl_legacy_rx_pm_sleep_notif);
+
+void iwl_legacy_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
+ struct iwl_rx_mem_buffer *rxb)
+{
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
+ u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
+ IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
+ "notification for %s:\n", len,
+ iwl_legacy_get_cmd_string(pkt->hdr.cmd));
+ iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
+}
+EXPORT_SYMBOL(iwl_legacy_rx_pm_debug_statistics_notif);
+
+void iwl_legacy_rx_reply_error(struct iwl_priv *priv,
+ struct iwl_rx_mem_buffer *rxb)
+{
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
+
+ IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
+ "seq 0x%04X ser 0x%08X\n",
+ le32_to_cpu(pkt->u.err_resp.error_type),
+ iwl_legacy_get_cmd_string(pkt->u.err_resp.cmd_id),
+ pkt->u.err_resp.cmd_id,
+ le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
+ le32_to_cpu(pkt->u.err_resp.error_info));
+}
+EXPORT_SYMBOL(iwl_legacy_rx_reply_error);
+
+void iwl_legacy_clear_isr_stats(struct iwl_priv *priv)
+{
+ memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
+}
+
+int iwl_legacy_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
+ const struct ieee80211_tx_queue_params *params)
+{
+ struct iwl_priv *priv = hw->priv;
+ struct iwl_rxon_context *ctx;
+ unsigned long flags;
+ int q;
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+
+ if (!iwl_legacy_is_ready_rf(priv)) {
+ IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
+ return -EIO;
+ }
+
+ if (queue >= AC_NUM) {
+ IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
+ return 0;
+ }
+
+ q = AC_NUM - 1 - queue;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ for_each_context(priv, ctx) {
+ ctx->qos_data.def_qos_parm.ac[q].cw_min =
+ cpu_to_le16(params->cw_min);
+ ctx->qos_data.def_qos_parm.ac[q].cw_max =
+ cpu_to_le16(params->cw_max);
+ ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
+ ctx->qos_data.def_qos_parm.ac[q].edca_txop =
+ cpu_to_le16((params->txop * 32));
+
+ ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
+ }
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+ return 0;
+}
+EXPORT_SYMBOL(iwl_legacy_mac_conf_tx);
+
+int iwl_legacy_mac_tx_last_beacon(struct ieee80211_hw *hw)
+{
+ struct iwl_priv *priv = hw->priv;
+
+ return priv->ibss_manager == IWL_IBSS_MANAGER;
+}
+EXPORT_SYMBOL_GPL(iwl_legacy_mac_tx_last_beacon);
+
+static int
+iwl_legacy_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
+{
+ iwl_legacy_connection_init_rx_config(priv, ctx);
+
+ if (priv->cfg->ops->hcmd->set_rxon_chain)
+ priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
+
+ return iwl_legacy_commit_rxon(priv, ctx);
+}
+
+static int iwl_legacy_setup_interface(struct iwl_priv *priv,
+ struct iwl_rxon_context *ctx)
+{
+ struct ieee80211_vif *vif = ctx->vif;
+ int err;
+
+ lockdep_assert_held(&priv->mutex);
+
+ /*
+ * This variable will be correct only when there's just
+ * a single context, but all code using it is for hardware
+ * that supports only one context.
+ */
+ priv->iw_mode = vif->type;
+
+ ctx->is_active = true;
+
+ err = iwl_legacy_set_mode(priv, ctx);
+ if (err) {
+ if (!ctx->always_active)
+ ctx->is_active = false;
+ return err;
+ }
+
+ return 0;
+}
+
+int
+iwl_legacy_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
+{
+ struct iwl_priv *priv = hw->priv;
+ struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
+ struct iwl_rxon_context *tmp, *ctx = NULL;
+ int err;
+
+ IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
+ vif->type, vif->addr);
+
+ mutex_lock(&priv->mutex);
+
+ if (!iwl_legacy_is_ready_rf(priv)) {
+ IWL_WARN(priv, "Try to add interface when device not ready\n");
+ err = -EINVAL;
+ goto out;
+ }
+
+ for_each_context(priv, tmp) {
+ u32 possible_modes =
+ tmp->interface_modes | tmp->exclusive_interface_modes;
+
+ if (tmp->vif) {
+ /* check if this busy context is exclusive */
+ if (tmp->exclusive_interface_modes &
+ BIT(tmp->vif->type)) {
+ err = -EINVAL;
+ goto out;
+ }
+ continue;
+ }
+
+ if (!(possible_modes & BIT(vif->type)))
+ continue;
+
+ /* have maybe usable context w/o interface */
+ ctx = tmp;
+ break;
+ }
+
+ if (!ctx) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ vif_priv->ctx = ctx;
+ ctx->vif = vif;
+
+ err = iwl_legacy_setup_interface(priv, ctx);
+ if (!err)
+ goto out;
+
+ ctx->vif = NULL;
+ priv->iw_mode = NL80211_IFTYPE_STATION;
+ out:
+ mutex_unlock(&priv->mutex);
+
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+ return err;
+}
+EXPORT_SYMBOL(iwl_legacy_mac_add_interface);
+
+static void iwl_legacy_teardown_interface(struct iwl_priv *priv,
+ struct ieee80211_vif *vif,
+ bool mode_change)
+{
+ struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
+
+ lockdep_assert_held(&priv->mutex);
+
+ if (priv->scan_vif == vif) {
+ iwl_legacy_scan_cancel_timeout(priv, 200);
+ iwl_legacy_force_scan_end(priv);
+ }
+
+ if (!mode_change) {
+ iwl_legacy_set_mode(priv, ctx);
+ if (!ctx->always_active)
+ ctx->is_active = false;
+ }
+}
+
+void iwl_legacy_mac_remove_interface(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct iwl_priv *priv = hw->priv;
+ struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+
+ mutex_lock(&priv->mutex);
+
+ WARN_ON(ctx->vif != vif);
+ ctx->vif = NULL;
+
+ iwl_legacy_teardown_interface(priv, vif, false);
+
+ memset(priv->bssid, 0, ETH_ALEN);
+ mutex_unlock(&priv->mutex);
+
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+
+}
+EXPORT_SYMBOL(iwl_legacy_mac_remove_interface);
+
+int iwl_legacy_alloc_txq_mem(struct iwl_priv *priv)
+{
+ if (!priv->txq)
+ priv->txq = kzalloc(
+ sizeof(struct iwl_tx_queue) *
+ priv->cfg->base_params->num_of_queues,
+ GFP_KERNEL);
+ if (!priv->txq) {
+ IWL_ERR(priv, "Not enough memory for txq\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(iwl_legacy_alloc_txq_mem);
+
+void iwl_legacy_txq_mem(struct iwl_priv *priv)
+{
+ kfree(priv->txq);
+ priv->txq = NULL;
+}
+EXPORT_SYMBOL(iwl_legacy_txq_mem);
+
+#ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
+
+#define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
+
+void iwl_legacy_reset_traffic_log(struct iwl_priv *priv)
+{
+ priv->tx_traffic_idx = 0;
+ priv->rx_traffic_idx = 0;
+ if (priv->tx_traffic)
+ memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
+ if (priv->rx_traffic)
+ memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
+}
+
+int iwl_legacy_alloc_traffic_mem(struct iwl_priv *priv)
+{
+ u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
+
+ if (iwlegacy_debug_level & IWL_DL_TX) {
+ if (!priv->tx_traffic) {
+ priv->tx_traffic =
+ kzalloc(traffic_size, GFP_KERNEL);
+ if (!priv->tx_traffic)
+ return -ENOMEM;
+ }
+ }
+ if (iwlegacy_debug_level & IWL_DL_RX) {
+ if (!priv->rx_traffic) {
+ priv->rx_traffic =
+ kzalloc(traffic_size, GFP_KERNEL);
+ if (!priv->rx_traffic)
+ return -ENOMEM;
+ }
+ }
+ iwl_legacy_reset_traffic_log(priv);
+ return 0;
+}
+EXPORT_SYMBOL(iwl_legacy_alloc_traffic_mem);
+
+void iwl_legacy_free_traffic_mem(struct iwl_priv *priv)
+{
+ kfree(priv->tx_traffic);
+ priv->tx_traffic = NULL;
+
+ kfree(priv->rx_traffic);
+ priv->rx_traffic = NULL;
+}
+EXPORT_SYMBOL(iwl_legacy_free_traffic_mem);
+
+void iwl_legacy_dbg_log_tx_data_frame(struct iwl_priv *priv,
+ u16 length, struct ieee80211_hdr *header)
+{
+ __le16 fc;
+ u16 len;
+
+ if (likely(!(iwlegacy_debug_level & IWL_DL_TX)))
+ return;
+
+ if (!priv->tx_traffic)
+ return;
+
+ fc = header->frame_control;
+ if (ieee80211_is_data(fc)) {
+ len = (length > IWL_TRAFFIC_ENTRY_SIZE)
+ ? IWL_TRAFFIC_ENTRY_SIZE : length;
+ memcpy((priv->tx_traffic +
+ (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
+ header, len);
+ priv->tx_traffic_idx =
+ (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
+ }
+}
+EXPORT_SYMBOL(iwl_legacy_dbg_log_tx_data_frame);
+
+void iwl_legacy_dbg_log_rx_data_frame(struct iwl_priv *priv,
+ u16 length, struct ieee80211_hdr *header)
+{
+ __le16 fc;
+ u16 len;
+
+ if (likely(!(iwlegacy_debug_level & IWL_DL_RX)))
+ return;
+
+ if (!priv->rx_traffic)
+ return;
+
+ fc = header->frame_control;
+ if (ieee80211_is_data(fc)) {
+ len = (length > IWL_TRAFFIC_ENTRY_SIZE)
+ ? IWL_TRAFFIC_ENTRY_SIZE : length;
+ memcpy((priv->rx_traffic +
+ (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
+ header, len);
+ priv->rx_traffic_idx =
+ (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
+ }
+}
+EXPORT_SYMBOL(iwl_legacy_dbg_log_rx_data_frame);
+
+const char *iwl_legacy_get_mgmt_string(int cmd)
+{
+ switch (cmd) {
+ IWL_CMD(MANAGEMENT_ASSOC_REQ);
+ IWL_CMD(MANAGEMENT_ASSOC_RESP);
+ IWL_CMD(MANAGEMENT_REASSOC_REQ);
+ IWL_CMD(MANAGEMENT_REASSOC_RESP);
+ IWL_CMD(MANAGEMENT_PROBE_REQ);
+ IWL_CMD(MANAGEMENT_PROBE_RESP);
+ IWL_CMD(MANAGEMENT_BEACON);
+ IWL_CMD(MANAGEMENT_ATIM);
+ IWL_CMD(MANAGEMENT_DISASSOC);
+ IWL_CMD(MANAGEMENT_AUTH);
+ IWL_CMD(MANAGEMENT_DEAUTH);
+ IWL_CMD(MANAGEMENT_ACTION);
+ default:
+ return "UNKNOWN";
+
+ }
+}
+
+const char *iwl_legacy_get_ctrl_string(int cmd)
+{
+ switch (cmd) {
+ IWL_CMD(CONTROL_BACK_REQ);
+ IWL_CMD(CONTROL_BACK);
+ IWL_CMD(CONTROL_PSPOLL);
+ IWL_CMD(CONTROL_RTS);
+ IWL_CMD(CONTROL_CTS);
+ IWL_CMD(CONTROL_ACK);
+ IWL_CMD(CONTROL_CFEND);
+ IWL_CMD(CONTROL_CFENDACK);
+ default:
+ return "UNKNOWN";
+
+ }
+}
+
+void iwl_legacy_clear_traffic_stats(struct iwl_priv *priv)
+{
+ memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
+ memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
+}
+
+/*
+ * if CONFIG_IWLWIFI_LEGACY_DEBUGFS defined,
+ * iwl_legacy_update_stats function will
+ * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
+ * Use debugFs to display the rx/rx_statistics
+ * if CONFIG_IWLWIFI_LEGACY_DEBUGFS not being defined, then no MGMT and CTRL
+ * information will be recorded, but DATA pkt still will be recorded
+ * for the reason of iwl_led.c need to control the led blinking based on
+ * number of tx and rx data.
+ *
+ */
+void
+iwl_legacy_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
+{
+ struct traffic_stats *stats;
+
+ if (is_tx)
+ stats = &priv->tx_stats;
+ else
+ stats = &priv->rx_stats;
+
+ if (ieee80211_is_mgmt(fc)) {
+ switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
+ case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
+ stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
+ stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
+ stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
+ stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
+ stats->mgmt[MANAGEMENT_PROBE_REQ]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
+ stats->mgmt[MANAGEMENT_PROBE_RESP]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_BEACON):
+ stats->mgmt[MANAGEMENT_BEACON]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_ATIM):
+ stats->mgmt[MANAGEMENT_ATIM]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
+ stats->mgmt[MANAGEMENT_DISASSOC]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_AUTH):
+ stats->mgmt[MANAGEMENT_AUTH]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
+ stats->mgmt[MANAGEMENT_DEAUTH]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_ACTION):
+ stats->mgmt[MANAGEMENT_ACTION]++;
+ break;
+ }
+ } else if (ieee80211_is_ctl(fc)) {
+ switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
+ case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
+ stats->ctrl[CONTROL_BACK_REQ]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_BACK):
+ stats->ctrl[CONTROL_BACK]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
+ stats->ctrl[CONTROL_PSPOLL]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_RTS):
+ stats->ctrl[CONTROL_RTS]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_CTS):
+ stats->ctrl[CONTROL_CTS]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_ACK):
+ stats->ctrl[CONTROL_ACK]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_CFEND):
+ stats->ctrl[CONTROL_CFEND]++;
+ break;
+ case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
+ stats->ctrl[CONTROL_CFENDACK]++;
+ break;
+ }
+ } else {
+ /* data */
+ stats->data_cnt++;
+ stats->data_bytes += len;
+ }
+}
+EXPORT_SYMBOL(iwl_legacy_update_stats);
+#endif
+
+static void _iwl_legacy_force_rf_reset(struct iwl_priv *priv)
+{
+ if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+ return;
+
+ if (!iwl_legacy_is_any_associated(priv)) {
+ IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
+ return;
+ }
+ /*
+ * There is no easy and better way to force reset the radio,
+ * the only known method is switching channel which will force to
+ * reset and tune the radio.
+ * Use internal short scan (single channel) operation to should
+ * achieve this objective.
+ * Driver should reset the radio when number of consecutive missed
+ * beacon, or any other uCode error condition detected.
+ */
+ IWL_DEBUG_INFO(priv, "perform radio reset.\n");
+ iwl_legacy_internal_short_hw_scan(priv);
+}
+
+
+int iwl_legacy_force_reset(struct iwl_priv *priv, int mode, bool external)
+{
+ struct iwl_force_reset *force_reset;
+
+ if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+ return -EINVAL;
+
+ if (mode >= IWL_MAX_FORCE_RESET) {
+ IWL_DEBUG_INFO(priv, "invalid reset request.\n");
+ return -EINVAL;
+ }
+ force_reset = &priv->force_reset[mode];
+ force_reset->reset_request_count++;
+ if (!external) {
+ if (force_reset->last_force_reset_jiffies &&
+ time_after(force_reset->last_force_reset_jiffies +
+ force_reset->reset_duration, jiffies)) {
+ IWL_DEBUG_INFO(priv, "force reset rejected\n");
+ force_reset->reset_reject_count++;
+ return -EAGAIN;
+ }
+ }
+ force_reset->reset_success_count++;
+ force_reset->last_force_reset_jiffies = jiffies;
+ IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
+ switch (mode) {
+ case IWL_RF_RESET:
+ _iwl_legacy_force_rf_reset(priv);
+ break;
+ case IWL_FW_RESET:
+ /*
+ * if the request is from external(ex: debugfs),
+ * then always perform the request in regardless the module
+ * parameter setting
+ * if the request is from internal (uCode error or driver
+ * detect failure), then fw_restart module parameter
+ * need to be check before performing firmware reload
+ */
+ if (!external && !priv->cfg->mod_params->restart_fw) {
+ IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
+ "module parameter setting\n");
+ break;
+ }
+ IWL_ERR(priv, "On demand firmware reload\n");
+ /* Set the FW error flag -- cleared on iwl_down */
+ set_bit(STATUS_FW_ERROR, &priv->status);
+ wake_up_interruptible(&priv->wait_command_queue);
+ /*
+ * Keep the restart process from trying to send host
+ * commands by clearing the INIT status bit
+ */
+ clear_bit(STATUS_READY, &priv->status);
+ queue_work(priv->workqueue, &priv->restart);
+ break;
+ }
+ return 0;
+}
+
+int
+iwl_legacy_mac_change_interface(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ enum nl80211_iftype newtype, bool newp2p)
+{
+ struct iwl_priv *priv = hw->priv;
+ struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
+ struct iwl_rxon_context *tmp;
+ u32 interface_modes;
+ int err;
+
+ newtype = ieee80211_iftype_p2p(newtype, newp2p);
+
+ mutex_lock(&priv->mutex);
+
+ interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
+
+ if (!(interface_modes & BIT(newtype))) {
+ err = -EBUSY;
+ goto out;
+ }
+
+ if (ctx->exclusive_interface_modes & BIT(newtype)) {
+ for_each_context(priv, tmp) {
+ if (ctx == tmp)
+ continue;
+
+ if (!tmp->vif)
+ continue;
+
+ /*
+ * The current mode switch would be exclusive, but
+ * another context is active ... refuse the switch.
+ */
+ err = -EBUSY;
+ goto out;
+ }
+ }
+
+ /* success */
+ iwl_legacy_teardown_interface(priv, vif, true);
+ vif->type = newtype;
+ err = iwl_legacy_setup_interface(priv, ctx);
+ WARN_ON(err);
+ /*
+ * We've switched internally, but submitting to the
+ * device may have failed for some reason. Mask this
+ * error, because otherwise mac80211 will not switch
+ * (and set the interface type back) and we'll be
+ * out of sync with it.
+ */
+ err = 0;
+
+ out:
+ mutex_unlock(&priv->mutex);
+ return err;
+}
+EXPORT_SYMBOL(iwl_legacy_mac_change_interface);
+
+/*
+ * On every watchdog tick we check (latest) time stamp. If it does not
+ * change during timeout period and queue is not empty we reset firmware.
+ */
+static int iwl_legacy_check_stuck_queue(struct iwl_priv *priv, int cnt)
+{
+ struct iwl_tx_queue *txq = &priv->txq[cnt];
+ struct iwl_queue *q = &txq->q;
+ unsigned long timeout;
+ int ret;
+
+ if (q->read_ptr == q->write_ptr) {
+ txq->time_stamp = jiffies;
+ return 0;
+ }
+
+ timeout = txq->time_stamp +
+ msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
+
+ if (time_after(jiffies, timeout)) {
+ IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
+ q->id, priv->cfg->base_params->wd_timeout);
+ ret = iwl_legacy_force_reset(priv, IWL_FW_RESET, false);
+ return (ret == -EAGAIN) ? 0 : 1;
+ }
+
+ return 0;
+}
+
+/*
+ * Making watchdog tick be a quarter of timeout assure we will
+ * discover the queue hung between timeout and 1.25*timeout
+ */
+#define IWL_WD_TICK(timeout) ((timeout) / 4)
+
+/*
+ * Watchdog timer callback, we check each tx queue for stuck, if if hung
+ * we reset the firmware. If everything is fine just rearm the timer.
+ */
+void iwl_legacy_bg_watchdog(unsigned long data)
+{
+ struct iwl_priv *priv = (struct iwl_priv *)data;
+ int cnt;
+ unsigned long timeout;
+
+ if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+ return;
+
+ timeout = priv->cfg->base_params->wd_timeout;
+ if (timeout == 0)
+ return;
+
+ /* monitor and check for stuck cmd queue */
+ if (iwl_legacy_check_stuck_queue(priv, priv->cmd_queue))
+ return;
+
+ /* monitor and check for other stuck queues */
+ if (iwl_legacy_is_any_associated(priv)) {
+ for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
+ /* skip as we already checked the command queue */
+ if (cnt == priv->cmd_queue)
+ continue;
+ if (iwl_legacy_check_stuck_queue(priv, cnt))
+ return;
+ }
+ }
+
+ mod_timer(&priv->watchdog, jiffies +
+ msecs_to_jiffies(IWL_WD_TICK(timeout)));
+}
+EXPORT_SYMBOL(iwl_legacy_bg_watchdog);
+
+void iwl_legacy_setup_watchdog(struct iwl_priv *priv)
+{
+ unsigned int timeout = priv->cfg->base_params->wd_timeout;
+
+ if (timeout)
+ mod_timer(&priv->watchdog,
+ jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
+ else
+ del_timer(&priv->watchdog);
+}
+EXPORT_SYMBOL(iwl_legacy_setup_watchdog);
+
+/*
+ * extended beacon time format
+ * time in usec will be changed into a 32-bit value in extended:internal format
+ * the extended part is the beacon counts
+ * the internal part is the time in usec within one beacon interval
+ */
+u32
+iwl_legacy_usecs_to_beacons(struct iwl_priv *priv,
+ u32 usec, u32 beacon_interval)
+{
+ u32 quot;
+ u32 rem;
+ u32 interval = beacon_interval * TIME_UNIT;
+
+ if (!interval || !usec)
+ return 0;
+
+ quot = (usec / interval) &
+ (iwl_legacy_beacon_time_mask_high(priv,
+ priv->hw_params.beacon_time_tsf_bits) >>
+ priv->hw_params.beacon_time_tsf_bits);
+ rem = (usec % interval) & iwl_legacy_beacon_time_mask_low(priv,
+ priv->hw_params.beacon_time_tsf_bits);
+
+ return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
+}
+EXPORT_SYMBOL(iwl_legacy_usecs_to_beacons);
+
+/* base is usually what we get from ucode with each received frame,
+ * the same as HW timer counter counting down
+ */
+__le32 iwl_legacy_add_beacon_time(struct iwl_priv *priv, u32 base,
+ u32 addon, u32 beacon_interval)
+{
+ u32 base_low = base & iwl_legacy_beacon_time_mask_low(priv,
+ priv->hw_params.beacon_time_tsf_bits);
+ u32 addon_low = addon & iwl_legacy_beacon_time_mask_low(priv,
+ priv->hw_params.beacon_time_tsf_bits);
+ u32 interval = beacon_interval * TIME_UNIT;
+ u32 res = (base & iwl_legacy_beacon_time_mask_high(priv,
+ priv->hw_params.beacon_time_tsf_bits)) +
+ (addon & iwl_legacy_beacon_time_mask_high(priv,
+ priv->hw_params.beacon_time_tsf_bits));
+
+ if (base_low > addon_low)
+ res += base_low - addon_low;
+ else if (base_low < addon_low) {
+ res += interval + base_low - addon_low;
+ res += (1 << priv->hw_params.beacon_time_tsf_bits);
+ } else
+ res += (1 << priv->hw_params.beacon_time_tsf_bits);
+
+ return cpu_to_le32(res);
+}
+EXPORT_SYMBOL(iwl_legacy_add_beacon_time);
+
+#ifdef CONFIG_PM
+
+int iwl_legacy_pci_suspend(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct iwl_priv *priv = pci_get_drvdata(pdev);
+
+ /*
+ * This function is called when system goes into suspend state
+ * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
+ * first but since iwl_mac_stop() has no knowledge of who the caller is,
+ * it will not call apm_ops.stop() to stop the DMA operation.
+ * Calling apm_ops.stop here to make sure we stop the DMA.
+ */
+ iwl_legacy_apm_stop(priv);
+
+ return 0;
+}
+EXPORT_SYMBOL(iwl_legacy_pci_suspend);
+
+int iwl_legacy_pci_resume(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct iwl_priv *priv = pci_get_drvdata(pdev);
+ bool hw_rfkill = false;
+
+ /*
+ * We disable the RETRY_TIMEOUT register (0x41) to keep
+ * PCI Tx retries from interfering with C3 CPU state.
+ */
+ pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
+
+ iwl_legacy_enable_interrupts(priv);
+
+ if (!(iwl_read32(priv, CSR_GP_CNTRL) &
+ CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
+ hw_rfkill = true;
+
+ if (hw_rfkill)
+ set_bit(STATUS_RF_KILL_HW, &priv->status);
+ else
+ clear_bit(STATUS_RF_KILL_HW, &priv->status);
+
+ wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
+
+ return 0;
+}
+EXPORT_SYMBOL(iwl_legacy_pci_resume);
+
+const struct dev_pm_ops iwl_legacy_pm_ops = {
+ .suspend = iwl_legacy_pci_suspend,
+ .resume = iwl_legacy_pci_resume,
+ .freeze = iwl_legacy_pci_suspend,
+ .thaw = iwl_legacy_pci_resume,
+ .poweroff = iwl_legacy_pci_suspend,
+ .restore = iwl_legacy_pci_resume,
+};
+EXPORT_SYMBOL(iwl_legacy_pm_ops);
+
+#endif /* CONFIG_PM */
+
+static void
+iwl_legacy_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
+{
+ if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+ return;
+
+ if (!ctx->is_active)
+ return;
+
+ ctx->qos_data.def_qos_parm.qos_flags = 0;
+
+ if (ctx->qos_data.qos_active)
+ ctx->qos_data.def_qos_parm.qos_flags |=
+ QOS_PARAM_FLG_UPDATE_EDCA_MSK;
+
+ if (ctx->ht.enabled)
+ ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
+
+ IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
+ ctx->qos_data.qos_active,
+ ctx->qos_data.def_qos_parm.qos_flags);
+
+ iwl_legacy_send_cmd_pdu_async(priv, ctx->qos_cmd,
+ sizeof(struct iwl_qosparam_cmd),
+ &ctx->qos_data.def_qos_parm, NULL);
+}
+
+/**
+ * iwl_legacy_mac_config - mac80211 config callback
+ */
+int iwl_legacy_mac_config(struct ieee80211_hw *hw, u32 changed)
+{
+ struct iwl_priv *priv = hw->priv;
+ const struct iwl_channel_info *ch_info;
+ struct ieee80211_conf *conf = &hw->conf;
+ struct ieee80211_channel *channel = conf->channel;
+ struct iwl_ht_config *ht_conf = &priv->current_ht_config;
+ struct iwl_rxon_context *ctx;
+ unsigned long flags = 0;
+ int ret = 0;
+ u16 ch;
+ int scan_active = 0;
+ bool ht_changed[NUM_IWL_RXON_CTX] = {};
+
+ if (WARN_ON(!priv->cfg->ops->legacy))
+ return -EOPNOTSUPP;
+
+ mutex_lock(&priv->mutex);
+
+ IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
+ channel->hw_value, changed);
+
+ if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
+ test_bit(STATUS_SCANNING, &priv->status))) {
+ scan_active = 1;
+ IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
+ }
+
+ if (changed & (IEEE80211_CONF_CHANGE_SMPS |
+ IEEE80211_CONF_CHANGE_CHANNEL)) {
+ /* mac80211 uses static for non-HT which is what we want */
+ priv->current_ht_config.smps = conf->smps_mode;
+
+ /*
+ * Recalculate chain counts.
+ *
+ * If monitor mode is enabled then mac80211 will
+ * set up the SM PS mode to OFF if an HT channel is
+ * configured.
+ */
+ if (priv->cfg->ops->hcmd->set_rxon_chain)
+ for_each_context(priv, ctx)
+ priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
+ }
+
+ /* during scanning mac80211 will delay channel setting until
+ * scan finish with changed = 0
+ */
+ if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
+ if (scan_active)
+ goto set_ch_out;
+
+ ch = channel->hw_value;
+ ch_info = iwl_legacy_get_channel_info(priv, channel->band, ch);
+ if (!iwl_legacy_is_channel_valid(ch_info)) {
+ IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
+ ret = -EINVAL;
+ goto set_ch_out;
+ }
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ for_each_context(priv, ctx) {
+ /* Configure HT40 channels */
+ if (ctx->ht.enabled != conf_is_ht(conf)) {
+ ctx->ht.enabled = conf_is_ht(conf);
+ ht_changed[ctx->ctxid] = true;
+ }
+ if (ctx->ht.enabled) {
+ if (conf_is_ht40_minus(conf)) {
+ ctx->ht.extension_chan_offset =
+ IEEE80211_HT_PARAM_CHA_SEC_BELOW;
+ ctx->ht.is_40mhz = true;
+ } else if (conf_is_ht40_plus(conf)) {
+ ctx->ht.extension_chan_offset =
+ IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
+ ctx->ht.is_40mhz = true;
+ } else {
+ ctx->ht.extension_chan_offset =
+ IEEE80211_HT_PARAM_CHA_SEC_NONE;
+ ctx->ht.is_40mhz = false;
+ }
+ } else
+ ctx->ht.is_40mhz = false;
+
+ /*
+ * Default to no protection. Protection mode will
+ * later be set from BSS config in iwl_ht_conf
+ */
+ ctx->ht.protection =
+ IEEE80211_HT_OP_MODE_PROTECTION_NONE;
+
+ /* if we are switching from ht to 2.4 clear flags
+ * from any ht related info since 2.4 does not
+ * support ht */
+ if ((le16_to_cpu(ctx->staging.channel) != ch))
+ ctx->staging.flags = 0;
+
+ iwl_legacy_set_rxon_channel(priv, channel, ctx);
+ iwl_legacy_set_rxon_ht(priv, ht_conf);
+
+ iwl_legacy_set_flags_for_band(priv, ctx, channel->band,
+ ctx->vif);
+ }
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ if (priv->cfg->ops->legacy->update_bcast_stations)
+ ret =
+ priv->cfg->ops->legacy->update_bcast_stations(priv);
+
+ set_ch_out:
+ /* The list of supported rates and rate mask can be different
+ * for each band; since the band may have changed, reset
+ * the rate mask to what mac80211 lists */
+ iwl_legacy_set_rate(priv);
+ }
+
+ if (changed & (IEEE80211_CONF_CHANGE_PS |
+ IEEE80211_CONF_CHANGE_IDLE)) {
+ ret = iwl_legacy_power_update_mode(priv, false);
+ if (ret)
+ IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
+ }
+
+ if (changed & IEEE80211_CONF_CHANGE_POWER) {
+ IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
+ priv->tx_power_user_lmt, conf->power_level);
+
+ iwl_legacy_set_tx_power(priv, conf->power_level, false);
+ }
+
+ if (!iwl_legacy_is_ready(priv)) {
+ IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
+ goto out;
+ }
+
+ if (scan_active)
+ goto out;
+
+ for_each_context(priv, ctx) {
+ if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
+ iwl_legacy_commit_rxon(priv, ctx);
+ else
+ IWL_DEBUG_INFO(priv,
+ "Not re-sending same RXON configuration.\n");
+ if (ht_changed[ctx->ctxid])
+ iwl_legacy_update_qos(priv, ctx);
+ }
+
+out:
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+ mutex_unlock(&priv->mutex);
+ return ret;
+}
+EXPORT_SYMBOL(iwl_legacy_mac_config);
+
+void iwl_legacy_mac_reset_tsf(struct ieee80211_hw *hw)
+{
+ struct iwl_priv *priv = hw->priv;
+ unsigned long flags;
+ /* IBSS can only be the IWL_RXON_CTX_BSS context */
+ struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+
+ if (WARN_ON(!priv->cfg->ops->legacy))
+ return;
+
+ mutex_lock(&priv->mutex);
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+
+ spin_lock_irqsave(&priv->lock, flags);
+ memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ /* new association get rid of ibss beacon skb */
+ if (priv->beacon_skb)
+ dev_kfree_skb(priv->beacon_skb);
+
+ priv->beacon_skb = NULL;
+
+ priv->timestamp = 0;
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ iwl_legacy_scan_cancel_timeout(priv, 100);
+ if (!iwl_legacy_is_ready_rf(priv)) {
+ IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
+ mutex_unlock(&priv->mutex);
+ return;
+ }
+
+ /* we are restarting association process
+ * clear RXON_FILTER_ASSOC_MSK bit
+ */
+ ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
+ iwl_legacy_commit_rxon(priv, ctx);
+
+ iwl_legacy_set_rate(priv);
+
+ mutex_unlock(&priv->mutex);
+
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+EXPORT_SYMBOL(iwl_legacy_mac_reset_tsf);
+
+static void iwl_legacy_ht_conf(struct iwl_priv *priv,
+ struct ieee80211_vif *vif)
+{
+ struct iwl_ht_config *ht_conf = &priv->current_ht_config;
+ struct ieee80211_sta *sta;
+ struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
+ struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
+
+ IWL_DEBUG_ASSOC(priv, "enter:\n");
+
+ if (!ctx->ht.enabled)
+ return;
+
+ ctx->ht.protection =
+ bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
+ ctx->ht.non_gf_sta_present =
+ !!(bss_conf->ht_operation_mode &
+ IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
+
+ ht_conf->single_chain_sufficient = false;
+
+ switch (vif->type) {
+ case NL80211_IFTYPE_STATION:
+ rcu_read_lock();
+ sta = ieee80211_find_sta(vif, bss_conf->bssid);
+ if (sta) {
+ struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
+ int maxstreams;
+
+ maxstreams = (ht_cap->mcs.tx_params &
+ IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
+ >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
+ maxstreams += 1;
+
+ if ((ht_cap->mcs.rx_mask[1] == 0) &&
+ (ht_cap->mcs.rx_mask[2] == 0))
+ ht_conf->single_chain_sufficient = true;
+ if (maxstreams <= 1)
+ ht_conf->single_chain_sufficient = true;
+ } else {
+ /*
+ * If at all, this can only happen through a race
+ * when the AP disconnects us while we're still
+ * setting up the connection, in that case mac80211
+ * will soon tell us about that.
+ */
+ ht_conf->single_chain_sufficient = true;
+ }
+ rcu_read_unlock();
+ break;
+ case NL80211_IFTYPE_ADHOC:
+ ht_conf->single_chain_sufficient = true;
+ break;
+ default:
+ break;
+ }
+
+ IWL_DEBUG_ASSOC(priv, "leave\n");
+}
+
+static inline void iwl_legacy_set_no_assoc(struct iwl_priv *priv,
+ struct ieee80211_vif *vif)
+{
+ struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
+
+ /*
+ * inform the ucode that there is no longer an
+ * association and that no more packets should be
+ * sent
+ */
+ ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
+ ctx->staging.assoc_id = 0;
+ iwl_legacy_commit_rxon(priv, ctx);
+}
+
+static void iwl_legacy_beacon_update(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct iwl_priv *priv = hw->priv;
+ unsigned long flags;
+ __le64 timestamp;
+ struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
+
+ if (!skb)
+ return;
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+
+ lockdep_assert_held(&priv->mutex);
+
+ if (!priv->beacon_ctx) {
+ IWL_ERR(priv, "update beacon but no beacon context!\n");
+ dev_kfree_skb(skb);
+ return;
+ }
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ if (priv->beacon_skb)
+ dev_kfree_skb(priv->beacon_skb);
+
+ priv->beacon_skb = skb;
+
+ timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
+ priv->timestamp = le64_to_cpu(timestamp);
+
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ if (!iwl_legacy_is_ready_rf(priv)) {
+ IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
+ return;
+ }
+
+ priv->cfg->ops->legacy->post_associate(priv);
+}
+
+void iwl_legacy_mac_bss_info_changed(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *bss_conf,
+ u32 changes)
+{
+ struct iwl_priv *priv = hw->priv;
+ struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
+ int ret;
+
+ if (WARN_ON(!priv->cfg->ops->legacy))
+ return;
+
+ IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
+
+ if (!iwl_legacy_is_alive(priv))
+ return;
+
+ mutex_lock(&priv->mutex);
+
+ if (changes & BSS_CHANGED_QOS) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ ctx->qos_data.qos_active = bss_conf->qos;
+ iwl_legacy_update_qos(priv, ctx);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }
+
+ if (changes & BSS_CHANGED_BEACON_ENABLED) {
+ /*
+ * the add_interface code must make sure we only ever
+ * have a single interface that could be beaconing at
+ * any time.
+ */
+ if (vif->bss_conf.enable_beacon)
+ priv->beacon_ctx = ctx;
+ else
+ priv->beacon_ctx = NULL;
+ }
+
+ if (changes & BSS_CHANGED_BSSID) {
+ IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
+
+ /*
+ * If there is currently a HW scan going on in the
+ * background then we need to cancel it else the RXON
+ * below/in post_associate will fail.
+ */
+ if (iwl_legacy_scan_cancel_timeout(priv, 100)) {
+ IWL_WARN(priv,
+ "Aborted scan still in progress after 100ms\n");
+ IWL_DEBUG_MAC80211(priv,
+ "leaving - scan abort failed.\n");
+ mutex_unlock(&priv->mutex);
+ return;
+ }
+
+ /* mac80211 only sets assoc when in STATION mode */
+ if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
+ memcpy(ctx->staging.bssid_addr,
+ bss_conf->bssid, ETH_ALEN);
+
+ /* currently needed in a few places */
+ memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
+ } else {
+ ctx->staging.filter_flags &=
+ ~RXON_FILTER_ASSOC_MSK;
+ }
+
+ }
+
+ /*
+ * This needs to be after setting the BSSID in case
+ * mac80211 decides to do both changes at once because
+ * it will invoke post_associate.
+ */
+ if (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
+ iwl_legacy_beacon_update(hw, vif);
+
+ if (changes & BSS_CHANGED_ERP_PREAMBLE) {
+ IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
+ bss_conf->use_short_preamble);
+ if (bss_conf->use_short_preamble)
+ ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
+ else
+ ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
+ }
+
+ if (changes & BSS_CHANGED_ERP_CTS_PROT) {
+ IWL_DEBUG_MAC80211(priv,
+ "ERP_CTS %d\n", bss_conf->use_cts_prot);
+ if (bss_conf->use_cts_prot &&
+ (priv->band != IEEE80211_BAND_5GHZ))
+ ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
+ else
+ ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
+ if (bss_conf->use_cts_prot)
+ ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
+ else
+ ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
+ }
+
+ if (changes & BSS_CHANGED_BASIC_RATES) {
+ /* XXX use this information
+ *
+ * To do that, remove code from iwl_legacy_set_rate() and put something
+ * like this here:
+ *
+ if (A-band)
+ ctx->staging.ofdm_basic_rates =
+ bss_conf->basic_rates;
+ else
+ ctx->staging.ofdm_basic_rates =
+ bss_conf->basic_rates >> 4;
+ ctx->staging.cck_basic_rates =
+ bss_conf->basic_rates & 0xF;
+ */
+ }
+
+ if (changes & BSS_CHANGED_HT) {
+ iwl_legacy_ht_conf(priv, vif);
+
+ if (priv->cfg->ops->hcmd->set_rxon_chain)
+ priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
+ }
+
+ if (changes & BSS_CHANGED_ASSOC) {
+ IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
+ if (bss_conf->assoc) {
+ priv->timestamp = bss_conf->timestamp;
+
+ if (!iwl_legacy_is_rfkill(priv))
+ priv->cfg->ops->legacy->post_associate(priv);
+ } else
+ iwl_legacy_set_no_assoc(priv, vif);
+ }
+
+ if (changes && iwl_legacy_is_associated_ctx(ctx) && bss_conf->aid) {
+ IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
+ changes);
+ ret = iwl_legacy_send_rxon_assoc(priv, ctx);
+ if (!ret) {
+ /* Sync active_rxon with latest change. */
+ memcpy((void *)&ctx->active,
+ &ctx->staging,
+ sizeof(struct iwl_legacy_rxon_cmd));
+ }
+ }
+
+ if (changes & BSS_CHANGED_BEACON_ENABLED) {
+ if (vif->bss_conf.enable_beacon) {
+ memcpy(ctx->staging.bssid_addr,
+ bss_conf->bssid, ETH_ALEN);
+ memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
+ priv->cfg->ops->legacy->config_ap(priv);
+ } else
+ iwl_legacy_set_no_assoc(priv, vif);
+ }
+
+ if (changes & BSS_CHANGED_IBSS) {
+ ret = priv->cfg->ops->legacy->manage_ibss_station(priv, vif,
+ bss_conf->ibss_joined);
+ if (ret)
+ IWL_ERR(priv, "failed to %s IBSS station %pM\n",
+ bss_conf->ibss_joined ? "add" : "remove",
+ bss_conf->bssid);
+ }
+
+ mutex_unlock(&priv->mutex);
+
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+EXPORT_SYMBOL(iwl_legacy_mac_bss_info_changed);
+
+irqreturn_t iwl_legacy_isr(int irq, void *data)
+{
+ struct iwl_priv *priv = data;
+ u32 inta, inta_mask;
+ u32 inta_fh;
+ unsigned long flags;
+ if (!priv)
+ return IRQ_NONE;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ /* Disable (but don't clear!) interrupts here to avoid
+ * back-to-back ISRs and sporadic interrupts from our NIC.
+ * If we have something to service, the tasklet will re-enable ints.
+ * If we *don't* have something, we'll re-enable before leaving here. */
+ inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
+ iwl_write32(priv, CSR_INT_MASK, 0x00000000);
+
+ /* Discover which interrupts are active/pending */
+ inta = iwl_read32(priv, CSR_INT);
+ inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
+
+ /* Ignore interrupt if there's nothing in NIC to service.
+ * This may be due to IRQ shared with another device,
+ * or due to sporadic interrupts thrown from our NIC. */
+ if (!inta && !inta_fh) {
+ IWL_DEBUG_ISR(priv,
+ "Ignore interrupt, inta == 0, inta_fh == 0\n");
+ goto none;
+ }
+
+ if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
+ /* Hardware disappeared. It might have already raised
+ * an interrupt */
+ IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
+ goto unplugged;
+ }
+
+ IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
+ inta, inta_mask, inta_fh);
+
+ inta &= ~CSR_INT_BIT_SCD;
+
+ /* iwl_irq_tasklet() will service interrupts and re-enable them */
+ if (likely(inta || inta_fh))
+ tasklet_schedule(&priv->irq_tasklet);
+
+unplugged:
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return IRQ_HANDLED;
+
+none:
+ /* re-enable interrupts here since we don't have anything to service. */
+ /* only Re-enable if diabled by irq */
+ if (test_bit(STATUS_INT_ENABLED, &priv->status))
+ iwl_legacy_enable_interrupts(priv);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return IRQ_NONE;
+}
+EXPORT_SYMBOL(iwl_legacy_isr);
+
+/*
+ * iwl_legacy_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
+ * function.
+ */
+void iwl_legacy_tx_cmd_protection(struct iwl_priv *priv,
+ struct ieee80211_tx_info *info,
+ __le16 fc, __le32 *tx_flags)
+{
+ if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
+ *tx_flags |= TX_CMD_FLG_RTS_MSK;
+ *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
+ *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
+
+ if (!ieee80211_is_mgmt(fc))
+ return;
+
+ switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
+ case cpu_to_le16(IEEE80211_STYPE_AUTH):
+ case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
+ case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
+ case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
+ *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
+ *tx_flags |= TX_CMD_FLG_CTS_MSK;
+ break;
+ }
+ } else if (info->control.rates[0].flags &
+ IEEE80211_TX_RC_USE_CTS_PROTECT) {
+ *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
+ *tx_flags |= TX_CMD_FLG_CTS_MSK;
+ *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
+ }
+}
+EXPORT_SYMBOL(iwl_legacy_tx_cmd_protection);